期刊
CHEMOSPHERE
卷 54, 期 8, 页码 1199-1206出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2003.09.035
关键词
arsenic speciation; HG-AAS; groundwater; West Bengal; India
A simple HG-AAS technique has been evaluated and standardised for rapid speciation of As(III) and As(V) in a number of contaminated groundwater samples of West Bengal, India. Citric acid has been used for selective hydride formation of As(III). The sensitivity of the evaluated HG-AAS method is 7.91 mg(-1) l, standard deviation, 0.001 and detection limit, 0.4 mug l(-1). As(III) sensitivity remains constant in the sample pH range of 2.3-10.6. Concomitant mineral matrix of the water samples did not interfere with arsenic determination. Eight out of ten groundwater samples analysed for AS(III)and As(V) contain more As(III), which lies in the range of 54-350 ppb. As(III) estimation. in drinking water along with total arsenic should be invoked as a policy for a realistic risk assessment of the contaminated water. (C) 2003 Elsevier Ltd. All rights reserved.
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